the rounded portion of the brain, directly behind the cerebrum in birds and mammals, that serves mainly to coordinate movement, posture, and balance. [1555â65; < Latin: brain, diminutive of cerebrum (for formation see castle)] cer`eâ¢belâ²lar, adj.
A pulled muscle is a painful injury that is caused when muscle fibers become torn. These injuries are usually caused by engaging in physical activity without properly warming up first. They can also occur when a person who is not in shape does something that is strenuous to the muscles.
A muscle strain is the stretching or tearing of muscle fibers. Most muscle strains happen for one of two reasons: either the muscle has been stretched beyond its limits or it has been forced to contract too strongly. In mild cases, only a few muscle fibers are stretched or torn, and the muscle remains intact and strong.